What is the SEER2 rating of the TCL THH48TEI2NAI0H24?

The TCL THH48TEI2NAI0H24 is rated at up to 18.0 SEER2 and 9.0 EER2 for cooling and up to 8.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.

Is the TCL THH48TEI2NAI0H24 good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 33,000 BTU/h at 5°F with a COP of 1.80, so it is still 1.8 times as efficient as electric resistance heat at that temperature.

How much does the TCL THH48TEI2NAI0H24 cost to run per year?

At its rated efficiency it costs about $1,230-$3,452 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,539 in Phoenix and $2,902 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the TCL THH48TEI2NAI0H24 the same as the ZERO ZOV-48HDTB?

Yes, as far as the certified ratings go. ENERGY STAR lists both model numbers with identical efficiency, capacity and matchups, which means the same outdoor unit sold under a different brand or with a minor variant code (voltage, colour or region). The full list is on this page.

Which indoor units work with the TCL THH48TEI2NAI0H24?

ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses THH48IEI2NAI0H24.

4-ton central heat pump · TOP 24

TCL THH48TEI2NAI0H24

Average cooling efficiency and below average heating efficiency for a 4-ton central heat pump, and certified for cold climates.

Ranks #108 of 319 4 ton central heat pumps for cooling efficiency, and costs about $1,428 a year to run in a mixed climate like Atlanta.

SEER2: 18.0 Cooling efficiency over a season
Average · beats 66%
HSPF2: 8.5 Heating efficiency over a season
Below average · beats 38%
EER2: 9.0 Cooling efficiency on a 95°F day
Below average · beats 4%
Heat at 5°F: 33,000 BTU/h70% of its 47°F output
Below average · beats 5%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 33,000 BTU/h at 5°F.
You want steady temperatures and quiet running - the compressor varies its speed.

Think twice if…

You mainly need heat - its HSPF2 is below average for central heat pumps.

Calculate my running cost

Details

Specifications4 ton, R-454B

General
Brand	TCL
Also sold as	ZERO
Outdoor unit model	THH48TEI2NAI0H24
Series	TOP 24
Type	Central heat pump
Nominal size	4 ton
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	November 2, 2024
Last certified	February 17, 2025
Cooling
SEER2Seasonal efficiency, higher is better	18.0 (range 18.0)
EER2Efficiency at 95°F outdoors	9.0
Cooling capacity	47,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	8.5
Capacity at 47°F	47,000 BTU/h
Capacity at 17°F	35,000 BTU/h
Capacity at 5°F	33,000 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.80
ENERGY STAR cold climate	Yes

Heating output as it gets colder70% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with THH48IEI2NAI0H24 at the standard test temperatures, in BTU/h:

Certified matchups1 indoor units

The same outdoor unit scores differently with each indoor unit. Ask your installer for the AHRI reference number of the exact system you are quoted.

Indoor unit	SEER2	EER2	HSPF2	Heat @5°F	AHRI ref.
THH48IEI2NAI0H24 · cold climate	18.0	9.0	8.5	33,000	216046820

Same unit, other model numbers1

These model numbers have exactly the same certified ratings and matchups as the TCL THH48TEI2NAI0H24: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

ZERO ZOV-48HDTB

Yearly running cost in 10 large cities$1,230-$3,452

Phoenix, AZ$1,539/yr
Miami, FL$1,230/yr
Houston, TX$1,380/yr
Atlanta, GA$1,428/yr
Los Angeles, CA$1,397/yr
New York, NY$3,452/yr
Chicago, IL$2,810/yr
Denver, CO$2,342/yr
Seattle, WA$1,444/yr
Minneapolis, MN$2,902/yr

At each state's average electricity price and the city's typical heating and cooling hours.

Questions6

What is the SEER2 rating of the TCL THH48TEI2NAI0H24?: The TCL THH48TEI2NAI0H24 is rated at up to 18.0 SEER2 and 9.0 EER2 for cooling and up to 8.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
Is the TCL THH48TEI2NAI0H24 good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 33,000 BTU/h at 5°F with a COP of 1.80, so it is still 1.8 times as efficient as electric resistance heat at that temperature.
How much does the TCL THH48TEI2NAI0H24 cost to run per year?: At its rated efficiency it costs about $1,230-$3,452 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,539 in Phoenix and $2,902 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the TCL THH48TEI2NAI0H24 the same as the ZERO ZOV-48HDTB?: Yes, as far as the certified ratings go. ENERGY STAR lists both model numbers with identical efficiency, capacity and matchups, which means the same outdoor unit sold under a different brand or with a minor variant code (voltage, colour or region). The full list is on this page.
Which indoor units work with the TCL THH48TEI2NAI0H24?: ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses THH48IEI2NAI0H24.
What refrigerant does the TCL THH48TEI2NAI0H24 use?: It uses R-454B.

Running cost and savings

Pre-filled with this model. Pick your city and what you heat with today; everything else is optional.

Heat pump $1,538/yrYou save $885/yrSee details ↓

1. Where you live

StateCityElectricity ¢ per kWh

Adjust heating and cooling hours

Filled in from your city's climate. Change them if you run the system much more or less than usual.

Cooling hours full-load hours per yearHeating hours full-load hours per year

2. The heat pump TCL THH48TEI2NAI0H24

Find a model (fills in the ratings below)

SEER2 cooling efficiencyHSPF2 heating efficiencyCooling capacity BTU/hHeating capacity BTU/h

3. What it replaces

Current heatingFurnace efficiency (AFUE %)Gas price, $/thermCurrent coolingOld AC rating SEER2 (10 ≈ 15+ years old)

4. Price replace the example with your quote

Installed price, $Rebates and incentives, $ utility, state

Heat pump, per year: $1,538
Current system, per year: $2,423
You save per year: $885
Payback: 19.8 years
Net after 10 years: -$8,650

Cooling $919Heating $619Electricity used: 9,615 kWhSaved vs. a minimum-efficiency heat pump: $320

Estimates use the unit's rated SEER2 and HSPF2, full-load hours derived from NOAA 1991-2020 degree days, average residential electricity prices from the U.S. EIA (12 months to July 2026) and fuel prices from EIA (2025 for natural gas, week of 2026-10-05 for propane and heating oil). Very cold days that need backup heat are not modelled. Federal minimum for comparison: 14.3 SEER2 / 7.5 HSPF2.

Similar 4 ton models

Kenmore (C,H,T)5H8T48*K*AAA18.0 SEER2 · 8.5 HSPF2
Tempstar T5H8T48*K*AAA18.0 SEER2 · 8.5 HSPF2
Heil H5H8T48*K*AAA18.0 SEER2 · 8.5 HSPF2
Trane 4TWV8X48A118.0 SEER2 · 8.5 HSPF2
Friedrich RD17AZ48AJ3N · cold climate18.0 SEER2 · 8.5 HSPF2
Trane 4TWV8X60A1 · cold climate18.0 SEER2 · 8.5 HSPF2
ECOTEMP W5H8T48*K*AAA18.0 SEER2 · 8.5 HSPF2
WeatherMaker PH8TAN548**AB18.0 SEER2 · 8.5 HSPF2

See all 319 4 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of February 17, 2025. How we use the data.